Casing-head attachment



C. M. HEETER.

CASING HEAD ATTACHMENT. APPLICATION FILED SEPT. 14. was.

1,366,075. Patented Jan. 18,1921.

F'IBJ 3 "v I! 1 9 g l2 1 V I3 5 5 6 WITNESSES I INVENTOR- 1 4. 2a. fizz,k MVZ M fl CHARLES M. HEETER, F BUTLER, PENNSYLVANIA.

cAsnve-nnan ATTACHMENT.

Application filed September 14:, 1916.

To aZZw/wm it may concern:

Be it known that I, CHARLES M. Human, a cltizen of the United States,and resident of Butler, in the county of Butler and State ofPennsylvania, have invented certain new and useful Improvements inCasing-Head Attachments, of which the following is-a specification.

p The obect of this invention is to provide improved sealing means forthe casing head of an oil well by means of which a string of tubing maybe either entered or withdrawn without oil or gas escaping from thecasing. The improved device is readily applied to casing heads of usualconstruction, and is intended for use only when entering or with drawingthe tubing, at other times the casing head being closed by the usualcasing head cap or closure well known in the art.

In the accompanying drawings, Figure 1 is a view in top plan tachment.Fig. 2 is a sectional elevation of the same in position on thecasinghead.

Referring to the drawings,2 designates a casing head of usualconstruction which is formed with a through vertical passage to thelower end 01. which thewell casing 23 connects. The casing head isprovided with the usual lateral gas or oil outletst'and,

at its upper end is formed with the dcpressed seat 5. Thisseat isadapted to recelve' a cap or closure (not shown) of ordinaryconstruction, also the attachment comprising the present invention, suchclosure or attachment, as the case may be, being secured by the setscrews 6 entering through the upstanding flange of seat 5.

The im n-oved attachment consists oi? the upper and lower head-likesections 7 and 8, respectively, which are adapted to be secured togetherby the clamping bolts 9, section 7 formed with base flange 7 which restson seat 5 on which it is secured by.

screws 6. The under side of section 8 is recessed upwardly at 10 toreceive the diaphragm ll of rubber or other flexible material.Projecting from the opposed clamping faces of the heads 7 and 8 are theannular V-shaped flanges or ridges 12, which when the heads are clampedtogether are impressed in the opposite facesiofthepliaphragm to insure asealed joint.

The through passageway in heads 7 and 8 for tubing 13 is flared orenlarged posite sides of the diaphragm so that the latter may flex asthe tubing is assed through the center opening therein, the do-Specification of Letters Patent.

oi'the improved atfor cooperating and clamping means for at op- PatentedJan. 1c, 1921. Serial No. 120,185.

flection being downward as the tubing is passed into the casing andupward as it is removed therefrom. The opening through the diaphragm isof such size that the latter is caused to closely fit around the tubing,preventing the escape 01 any gas or oil under pressure within thecasing. The flexibility or elasticity of the diaphragm is such that thetubing couplings 13 may be passed either upwardly or downwardlytherethrough without breaking the seal. After the tubing has been placedin position in the casing or after it has been withdrawn therefrom, theimproved attachment is replaced by a casing head cap or closure of usualconstruction.

The advantage of the invention results from the effectivesealing of thecasing duringthe operations of lowering and withdrawing the tubingwithout in any way interfering with those operations.

claim: 1.-A casing head attachment, comprising two superimposed sectionshaving interiorly enlarged registering vertical openings therethrough,the lower section having a base adapted to engage the usual cap orclosure seat of a well casing, a'packing diaphragm seated and clampedbetween the opposing faces of said sections, one of said sectionshavin'ga vertical spacing flange surround- .ing the edge of thediaphragm and adapted to contact with the other section to limit theapproach of said sections, and clamping means for securing said sectionstogether, substantially as described.

2. A. casing head attachment, comprising two superimposed sectionshaving interibase adapted to engage the usual cap or closure seat of awell casing, a packing diaphragm seated and clamped between the opposingfaces of said sections, one of said sections having a vertical spacingflange surrounding the edge of the diaphragm and adapted to contact withthe other section, a centering means on the otherof said sections withsaid spacing flange,

securing said sections together, substantially as described.

In testimony whereof I aflix my signature in the presence of twowitnesses.

' CHARLES M. HEETER. Witnesses:

Louise SMITH, A. J. Gmlrran.

